Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1754f09c174bd28…

MALICIOUS

PDF

73.4 KB Created: 2021-03-20 03:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a899fc4d52fe214e90642b2d0a433307 SHA-1: d919fce04c62bc7e1554ce590ff03caa9fa96f83 SHA-256: d1754f09c174bd2800a613e00b6a9c731f79c850a0e6bcd6bccdf8dbf2e1a509
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for SEO manipulation to lure victims. The embedded URLs point to sites that appear to be part of a phishing or malware distribution scheme, disguised as software driver downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/wix?keyword=vivitar+mini+digital+camera+driver+download+windows+7 PDF link annotation
    • https://lojijuzirikoza.weebly.com/uploads/1/3/4/5/134593465/fulekuzeza-bezowinonipe-faroxugemas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390056/normal_6002fb6f642a2.pdfIn PDF document text
    • https://pirodiditabun.weebly.com/uploads/1/3/0/9/130969169/sumubokitoremazus.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/giwikawoguvubutefogox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6033b531cd3bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_600b6bcabbd1c.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/real_estate_principles_11th_edition.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/1458937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_6001bd174b513.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/cardiac_surgery_books.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/venitar.pdfIn PDF document text
    • https://megigoxifiwovom.weebly.com/uploads/1/3/0/7/130740625/585f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_5fd2537e9592b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_aacd3de9e688477bba1cd6dadf90bd2e.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_dafa80be031a4160a090e6b2e6d3cc94.pdf?index=trueIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/aldehyde_ketone_and_carboxylic_acid.pdfIn PDF document text
    • http://jimarol.myartsonline.com/best_app_to_annotate_on_ipad_pro.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/the_barefoot_investor_2020_free.pdfIn PDF document text
    • https://80cb706b-a9cc-40e6-9cd2-ad5688d6c4a8.filesusr.com/ugd/c84a73_ae5ba766f401434787aa198fbbc3acdb.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E5 5456 bytes
SHA-256: 9681a2cf2dd39867f718c5cc5989f4ba9afd8fe17c76fc967001fb9bfb19c89c
font_01_sfnt_off0000f47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 10416 bytes
SHA-256: 0c0b7df6132face00087b12497882507c8f6696ea01df2bd72dba24c5262a56d

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